{"id":41748,"date":"2025-10-22T13:56:15","date_gmt":"2025-10-22T06:56:15","guid":{"rendered":"https:\/\/catlong.vn\/?page_id=41748"},"modified":"2025-10-22T15:30:34","modified_gmt":"2025-10-22T08:30:34","slug":"thach-cao","status":"publish","type":"page","link":"https:\/\/catlong.vn\/?page_id=41748","title":{"rendered":"Th\u1ea1ch Cao"},"content":{"rendered":"\t\t
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Gi\u1edbi thi\u1ec7u v\u1ec1 th\u1ea1ch cao nh\u00e2n t\u1ea1o v\u00e0 th\u1ea1ch cao nhi\u1ec7t \u0111i\u1ec7n<\/strong><\/span><\/p>\n

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Th\u1ea1ch cao l\u00e0 m\u1ed9t v\u1eadt li\u1ec7u quen thu\u1ed9c trong x\u00e2y d\u1ef1ng v\u00e0 \u0111\u1eddi s\u1ed1ng, nh\u01b0ng kh\u00f4ng ph\u1ea3i ai c\u0169ng bi\u1ebft \u0111\u1ebfn c\u00e1c lo\u1ea1i th\u1ea1ch cao nh\u00e2n t\u1ea1o, \u0111\u1eb7c bi\u1ec7t l\u00e0 th\u1ea1ch cao nhi\u1ec7t \u0111i\u1ec7n \u2013 m\u1ed9t s\u1ea3n ph\u1ea9m ph\u1ee5 c\u00f3 ngu\u1ed3n g\u1ed1c t\u1eeb c\u00f4ng nghi\u1ec7p ph\u00e1t \u0111i\u1ec7n. Vi\u1ec7c t\u1eadn d\u1ee5ng c\u00e1c lo\u1ea1i th\u1ea1ch cao n\u00e0y mang l\u1ea1i nhi\u1ec1u gi\u00e1 tr\u1ecb kinh t\u1ebf v\u00e0 m\u00f4i tr\u01b0\u1eddng.<\/p>\n

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Th\u1ea1ch cao nh\u00e2n t\u1ea1o l\u00e0 s\u1ea3n ph\u1ea9m ph\u1ee5 \u0111\u01b0\u1ee3c t\u1ea1o ra t\u1eeb c\u00e1c qu\u00e1 tr\u00ecnh c\u00f4ng nghi\u1ec7p, c\u00f3 th\u00e0nh ph\u1ea7n ch\u00ednh l\u00e0 canxi sunfat (CaSO\u2084\u00b72H\u2082O), t\u01b0\u01a1ng t\u1ef1 th\u1ea1ch cao t\u1ef1 nhi\u00ean. Trong s\u1ed1 \u0111\u00f3, hai ngu\u1ed3n ph\u00e1t sinh ph\u1ed5 bi\u1ebfn nh\u1ea5t l\u00e0 t\u1eeb qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t ph\u00e2n b\u00f3n (th\u1ea1ch cao phospho)<\/strong> v\u00e0 qu\u00e1 tr\u00ecnh kh\u1eed l\u01b0u hu\u1ef3nh kh\u00ed th\u1ea3i nh\u00e0 m\u00e1y nhi\u1ec7t \u0111i\u1ec7n (th\u1ea1ch cao FGD)<\/strong>. Vi\u1ec7c t\u1eadn d\u1ee5ng hai lo\u1ea1i th\u1ea1ch cao n\u00e0y kh\u00f4ng ch\u1ec9 mang l\u1ea1i gi\u00e1 tr\u1ecb kinh t\u1ebf m\u00e0 c\u00f2n g\u00f3p ph\u1ea7n b\u1ea3o v\u1ec7 m\u00f4i tr\u01b0\u1eddng.<\/p>\n

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Th\u1ea1ch cao phospho<\/strong><\/em> l\u00e0 s\u1ea3n ph\u1ea9m ph\u1ee5 t\u1eeb qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t axit phosphoric \u2013 nguy\u00ean li\u1ec7u ch\u00ednh \u0111\u1ec3 s\u1ea3n xu\u1ea5t ph\u00e2n b\u00f3n DAP, MAP ho\u1eb7c super l\u00e2n. Trong qu\u00e1 tr\u00ecnh n\u00e0y, qu\u1eb7ng apatit (ch\u1ee9a P\u2082O\u2085) \u0111\u01b0\u1ee3c x\u1eed l\u00fd b\u1eb1ng axit sulfuric (H\u2082SO\u2084), t\u1ea1o ra axit phosphoric v\u00e0 k\u1ebft t\u1ee7a canxi sunfat \u2013 ch\u00ednh l\u00e0 th\u1ea1ch cao nh\u00e2n t\u1ea1o. V\u1edbi m\u1ed7i t\u1ea5n axit phosphoric \u0111\u01b0\u1ee3c s\u1ea3n xu\u1ea5t, c\u00f3 th\u1ec3 t\u1ea1o ra kho\u1ea3ng 4\u20135 t\u1ea5n th\u1ea1ch cao phospho. Tuy nhi\u00ean, lo\u1ea1i th\u1ea1ch cao n\u00e0y th\u01b0\u1eddng ch\u1ee9a nhi\u1ec1u t\u1ea1p ch\u1ea5t nh\u01b0 fluor, kim lo\u1ea1i n\u1eb7ng, ph\u00f3ng x\u1ea1 nh\u1eb9,\u2026 n\u00ean c\u1ea7n \u0111\u01b0\u1ee3c x\u1eed l\u00fd k\u1ef9 l\u01b0\u1ee1ng tr\u01b0\u1edbc khi t\u00e1i s\u1eed d\u1ee5ng.<\/p>\n

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Th\u1ea1ch cao nhi\u1ec7t \u0111i\u1ec7n<\/strong><\/em> (th\u1ea1ch cao FGD \u2013 Flue Gas Desulfurization gypsum) l\u00e0 s\u1ea3n ph\u1ea9m thu \u0111\u01b0\u1ee3c t\u1eeb qu\u00e1 tr\u00ecnh kh\u1eed l\u01b0u hu\u1ef3nh kh\u00ed th\u1ea3i t\u1ea1i c\u00e1c nh\u00e0 m\u00e1y nhi\u1ec7t \u0111i\u1ec7n \u0111\u1ed1t than. B\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng \u0111\u00e1 v\u00f4i \u0111\u1ec3 h\u1ea5p th\u1ee5 kh\u00ed SO\u2082 trong kh\u00f3i th\u1ea3i, ng\u01b0\u1eddi ta thu \u0111\u01b0\u1ee3c canxi sunfat ng\u1eadm n\u01b0\u1edbc. \u0110\u00e2y l\u00e0 lo\u1ea1i th\u1ea1ch cao c\u00f3 \u0111\u1ed9 tinh khi\u1ebft cao h\u01a1n th\u1ea1ch cao phospho, \u00edt t\u1ea1p ch\u1ea5t v\u00e0 c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng tr\u1ef1c ti\u1ebfp trong nhi\u1ec1u l\u0129nh v\u1ef1c nh\u01b0 s\u1ea3n xu\u1ea5t xi m\u0103ng, t\u1ea5m th\u1ea1ch cao, v\u1eadt li\u1ec7u x\u00e2y d\u1ef1ng kh\u00f4ng nung, v\u00e0 l\u00e0m ch\u1ea5t c\u1ea3i t\u1ea1o \u0111\u1ea5t.<\/p>\n

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C\u1ea3 hai lo\u1ea1i th\u1ea1ch cao nh\u00e2n t\u1ea1o n\u00e0y \u0111\u1ec1u l\u00e0 ph\u1ebf ph\u1ea9m c\u00f4ng nghi\u1ec7p, n\u1ebfu kh\u00f4ng \u0111\u01b0\u1ee3c x\u1eed l\u00fd v\u00e0 t\u00e1i s\u1eed d\u1ee5ng h\u1ee3p l\u00fd s\u1ebd g\u00e2y ra \u00f4 nhi\u1ec5m m\u00f4i tr\u01b0\u1eddng nghi\u00eam tr\u1ecdng, chi\u1ebfm di\u1ec7n t\u00edch b\u00e3i th\u1ea3i l\u1edbn, v\u00e0 ti\u1ec1m \u1ea9n r\u1ee7i ro cho \u0111\u1ea5t, n\u01b0\u1edbc v\u00e0 kh\u00f4ng kh\u00ed. Tuy nhi\u00ean, n\u1ebfu \u0111\u01b0\u1ee3c \u0111\u1ea7u t\u01b0 c\u00f4ng ngh\u1ec7 x\u1eed l\u00fd, th\u1ea1ch cao nh\u00e2n t\u1ea1o ho\u00e0n to\u00e0n c\u00f3 th\u1ec3 thay th\u1ebf th\u1ea1ch cao t\u1ef1 nhi\u00ean, g\u00f3p ph\u1ea7n ti\u1ebft ki\u1ec7m t\u00e0i nguy\u00ean v\u00e0 ph\u00e1t tri\u1ec3n kinh t\u1ebf tu\u1ea7n ho\u00e0n.<\/p>\n

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T\u1ea1i Vi\u1ec7t Nam, l\u01b0\u1ee3ng th\u1ea1ch cao nh\u00e2n t\u1ea1o ph\u00e1t sinh h\u00e0ng n\u0103m l\u00ean \u0111\u1ebfn h\u00e0ng tri\u1ec7u t\u1ea5n, ch\u1ee7 y\u1ebfu t\u1eeb c\u00e1c nh\u00e0 m\u00e1y s\u1ea3n xu\u1ea5t ph\u00e2n b\u00f3n v\u00e0 nhi\u1ec7t \u0111i\u1ec7n. Vi\u1ec7c t\u1eadn d\u1ee5ng ngu\u1ed3n th\u1ea1ch cao n\u00e0y \u0111ang \u0111\u01b0\u1ee3c th\u00fac \u0111\u1ea9y th\u00f4ng qua c\u00e1c ch\u00ednh s\u00e1ch m\u00f4i tr\u01b0\u1eddng v\u00e0 \u0111\u1ecbnh h\u01b0\u1edbng ph\u00e1t tri\u1ec3n v\u1eadt li\u1ec7u x\u00e2y d\u1ef1ng b\u1ec1n v\u1eefng.<\/p>\n

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T\u00f3m l\u1ea1i, th\u1ea1ch cao nh\u00e2n t\u1ea1o t\u1eeb c\u00f4ng nghi\u1ec7p ph\u00e2n b\u00f3n v\u00e0 nhi\u1ec7t \u0111i\u1ec7n l\u00e0 ngu\u1ed3n t\u00e0i nguy\u00ean th\u1ee9 c\u1ea5p qu\u00fd gi\u00e1. N\u1ebfu \u0111\u01b0\u1ee3c khai th\u00e1c h\u1ee3p l\u00fd, \u0111\u00e2y s\u1ebd l\u00e0 h\u01b0\u1edbng \u0111i hi\u1ec7u qu\u1ea3 v\u1eeba b\u1ea3o v\u1ec7 m\u00f4i tr\u01b0\u1eddng, v\u1eeba ph\u1ee5c v\u1ee5 ph\u00e1t tri\u1ec3n kinh t\u1ebf – x\u00e3 h\u1ed9i b\u1ec1n v\u1eefng<\/p>\n

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